Abstract: A beacon includes an infrared emitter configured to emit beacon signals; an infrared-link emitter configured to emit infrared-link signals having a wavelength different from that of the beacon signals; an infrared-link detector configured to detect infrared-link signals; a memory configured to store a delay time; a clock configured to generate a clock cycle signal; and a microcontroller configured to, in response to receiving an infrared-link signal including a signaling code and clock synchronization data from an external beacon: adjust the clock to be synchronized with a clock of the external beacon; store the signaling code in the memory; and when the clock cycle signal generated by the clock indicates that it is a starting time of a clock cycle period, control the infrared emitter to emit a beacon signal including the signaling code with the delay time relative to the starting time of the clock cycle period.

Abstract: A method for power management in a beacon includes determining a program density of a signaling program; determining an initial driving voltage using the program density; determining a current setting for an emitter using the initial driving voltage; adjusting the initial driving voltage to a start-up voltage; executing the signaling program using the start-up voltage; and adjusting the start-up voltage to a signaling voltage.

Abstract: A method for power management in a beacon includes determining a program density of a signaling program; determining an initial driving voltage using the program density; determining a current setting for an emitter using the initial driving voltage; adjusting the initial driving voltage to a start-up voltage; executing the signaling program using the start-up voltage; and adjusting the start-up voltage to a signaling voltage.

Abstract: A method and apparatus for preventing fratricide including an emitter that emits a signaling code at a wavelength, the signaling code representing a coded message; a receiver that captures an image of a field of view including the emitter and generates image information corresponding to the captured image; a translation system that: receives the image information, and decodes the coded message from the image information; and a output device that outputs the decoded message.